Extended Technical Presentations: MD&A


Date and Time: Wednesday, June 24 @ 1:45 PM Eastern / 10:45 AM Pacific

7FA Parts & Fuel Nozzle Lifetime Extension Examples, Mark VI Controls & 7FH2 Generator Field Findings

Mark VI Controls

Presenter: Joe Clappis, Senior Controls Engineer

Abstract: Our Control Systems Division will be demonstrating the usefulness of the Toobox/ToolboxST ‘Trend Recorder’ (also called ‘Trender’) for troubleshooting trips and operational problems. A very basic explanation of Trend Recorder will be presented, then recorded data from various events (trips; operational issues; etc.) will be presented. Emphasis will be on reviewing and analyzing existing Trend Recorder files automatically created and uploaded to the GE® Mark VI HMI every hour and after any turbine trip. We will also show how to access Alarms and Events on the files for better understanding of the information and the data/trip.

7FA Component Lifetime Extension

Presenter: José Quiñones, Director of Engineering

Abstract: Typical gas turbine components operate to the OEM recommended useful life. In order to determine if the components are candidates for a lifetime extension, we need to understand if the parent material has the properties needed to operate one more service interval. We also need to ensure that the repair that will be implemented can also operate for one more service interval. In the process of learning about the components condition we also get to understand their failure modes. We use these lessons learned to design gas turbine components that are more robust in operation and more repairable. Our repair center has repaired over 1,200 F-class sets of components. In this webinar we will cover the typical limiting factors of 7F gas turbine components and how they can be repaired. We will cover the steps used in implementing a lifetime extension and will show specific case studies.      

7FA Fuel Nozzle End Cover Insert Life Extension Example & In-Situ Flow Test

Presenter: Pat Murphy, Director

Abstract: 7FA Fuel Nozzle End Cover Insert Life Extension example and in-situ flow test for Fuel nozzles. ICS (Integrated Combustion Solutions) / MD&A Fuel Nozzle Services Division can extend the service life of a Fuel Nozzle End Cover. The life expectancy of an end cover increases from the OEM claim of 48,000 hrs. to over 125,000 hrs. with a new maximum of 7 insert replacements per cover. MD&A will go through a specific 7FA example.

7FH2 Generator Field Winding Shorted Turn, Ground Wall Insulation Findings

Presenter: James Joyce, Generator Operations Manager

Abstract: 7FH2 Field winding shorted turn / ground wall insulation findings – summarize findings from 7FH2 fields that MD&A has refurbished in their shop (or at site) – this issue (particularly typical shorted turn locations) may be very design dependent (i.e. whether at end turn corner areas, C-coil braze joints, etc.) – MD&A should be able to provide useful data from their experience.


General MD&A & Outage Services: +1 518-399-3616

MD&A Turbine-Generator Repair Facility: +1 314-880-3000

MD&A Gas Turbine Parts Service Facility: +1 210-256-5000

MD&A Parts Division:+1 518-885-3199

MD&A Bearings, Seals & Hydraulics Division: +1 440-946-0082

MD&A Control Systems: +1 970-224-2223

About MD&A

Mechanical Dynamics & Analysis (MD&A) provides power generators around the globe with a full-service, OEM-alternative for services, parts, and repairs for Gas Turbines, Steam Turbines & Generators. In our 35 years, our commitment to excellence has earned customer trust for all turbine-generator needs. We focus on delivering consistent quality and value with fast response, superior communications, and innovative solutions.

MD&A is easy to work with. We provide immediate access to expert help when you need it, where you need it. Around the corner or the globe, we ensure prompt, thorough communication and follow-through. For every repair job, large or small, the speed and effectiveness of our response team is matched only by the depth and breadth of our engineering expertise.

Find out today why so many power generators use MD&A to maximize operational effectiveness.

Products and Services

Gas Turbines

Outage Planning
Gas Turbine Technical Direction
Gas Turbine Turnkey Labor & Turnkey Inspections
Gas Turbine Rotor Repair
Gas Turbine Component Repair
Fuel Nozzle Repair
Compressor Vane Pinning Solutions
Gas Turbine Bearings Repairs
Oil Deflector Repairs
Bronze Turbine Seal Ring Repairs
Gas Turbine Alignment
Coupling Laser Alignment
Operational Alignment Diagnostics-CMM System
Field Machining Services
Control Excitation Field
Control and Excitation Field Engineering, Consulting & Training
Gas Turbine End of Life Evaluation
Turbine System Enhancements
Turbine Foundation Monitoring
Centerline Installation
Thermodynamic Analysis
Thermographic Survey
Performance Testing & Analysis
High Speed Balance Facility
Gas Turbine Parts & Upgrades

Steam Turbines

Outage Planning
Technical Direction
Turnkey Inspection
Turnkey Labor
Turbine Topless Laser Alignment
Operational Alignment Diagnostics-CMM System
Coupling Laser Alignment
Custom Seal Installation
Field Machining Services
Balancing & Vibration Analysis
Control and Excitation Field Engineering, Consulting & Training
Steam Path Audits
Turbine Engineering
Remaining Life & Finite Element Analysis
Performance Testing & Analysis
Thermodynamic Analysis
Thermographic Survey
Turbine System Enhancements
Turbine Control Retrofits
Turbine Foundation Monitoring
Centerline Installation
Acceptance Testing
Stationary & Rotating Component Repair
Rotor Straightening
Casing/Shell Analysis & Renovation
Bearing Ball Ring Repairs
Distortion Correction
High Speed Balance
High Pressure Valve Repair
Valve Actuator Repair
Westinghouse Horizontal Throttle Valve Repair
Steam Seal Regulator
MHC Operating Governor
Control Pac Power Actuators
Overspeed Governor
Control Rotor
Bearing Repair
Oil Deflectors
Portable Machine Shops
Machining Services
Steam Turbine Parts


Robotic Generator In-Situ Inspection
Generator Testing & Inspections
High Speed balance
Balancing & Vibration Analysis
Control and Excitation Field Engineering, Consulting & Training
Generator Excitation Retrofits
Turbine System Enhancements
Turbine Foundation Monitoring
Center-line Installations
Generator Parts

Spec Sheets

Full Contact Sheet

GT Rotor Lifespan Assessment and Parts Lifetime Extension

7FH2 Spring Migration Repair

MDA Fuel Nozzles




19 British American Blvd E
Latham, New York 12110
United States